Machines / Mira 6S — System Overview

Mira 6S 5-Axis CNC Mill

The Mira 6S is a desktop 5-axis simultaneous CNC mill designed specifically for the jewelry industry. It manufactures complex wax models and rapid prototypes from common 3D file formats — including Rhino3D, Matrix, and RhinoGold.

Mira 6S 5-axis desktop CNC mill
Mira 6S

Five-Axis Configuration

Three linear axes move the spindle; a Dual Rotary Table rotates the workpiece across two more — simultaneously.

Three-quarter view of the Mira 6S: the spindle and Z column above the dual rotary table, with the NS-Motion monitor at rightthree-quarter viewspindle — 50,000 rpmZ — 163 mmA — 360° continuousB — 360° continuousX — 123 mmY — 190 mm

The workpiece moves too.

A Dual Rotary Table rotates workpieces across two axes while maintaining stability. Rotary motion is managed by a simultaneous rotary table control system — Smart Angular Movements Control.

Both rotary axes turn 360° continuously at up to 300° per second, so the cutter reaches every face of the model without repositioning.

Linear axes
X, Y, Z
Rotary axes
A, B
Rotary speed
300°/sec
Rotation
360° continuous
The Short List

Six specs that matter most.

Everything here comes off the spec sheet — the full table is further down the page.

True simultaneous 5-axis

Three linear axes (X, Y, Z) plus a Dual Rotary Table (A, B) that rotates the workpiece across two axes while maintaining stability — coordinated by Smart Angular Movements Control.

Servo motion, no measurable backlash

Carriage movement is driven by ball screws and servomotors for high-speed, high-force precision. When an axis reverses direction there is no measurable slack — no measurable backlash.

Resolution of 0.3 microns

The smallest commanded move is 0.0003 mm. That resolution is what produces fine details and the glossy surface finishes wax models need to cast cleanly.

A Nakanishi spindle

The NSK Nakanishi NR-2351 — ceramic bearings, a precision-ground hardened stainless steel housing, speeds up to 50,000 RPM, and milling-bit runout of 1 micron or less.

Self-contained control

NS-Motion, the 5-axis control program, runs on a mini PC built into the machine. JewelryCAM — the CAM software that builds the milling toolpaths, no G-code or CNC-machining background needed — is included with every unit.

Standard wall power

110 or 220 VAC single phase, roughly 1,000 W — an ordinary outlet. At 22 × 32 × 39″ and 200 lb (90 kg), it is a desktop machine in the literal sense.

Mira 6S

Performance and Mechanics

A resolution of 0.3 microns (0.0003 mm) and no measurable backlash enable fine details and glossy surface finishes.

Ball screws and servomotors.

Carriage movement is driven by ball screws and servomotors for high-speed, high-force precision. When an axis reverses direction there is no measurable slack — no measurable backlash.

Resolution
0.3 μm
Backlash
Zero
Max feed rate
200 in/min
Drive
Ball screws · servo
Resolutionsmallest commanded move0.3 μm
Positional accuracyhow close it lands to a target8 μm
Repeatabilityhow exactly it returns, cut after cut10 μm
scale: full bar = 10 μm = 0.01 mm. a human hair is ~70 μm.
The Machine

Everything on one bench.

Motion, control computer, coolant, and the dual rotary table in a 22 × 32 × 39″ footprint. The numbers reference the photo.

Front view of the Mira 6S with the spindle, dual rotary table, coolant tray, Z column, bellows covers, and NS-Motion monitor
01

The spindle

NSK Nakanishi NR-2351 with ceramic bearings — up to 50,000 RPM, runout of 1 micron or less. Coolant nozzles flank the collet.

02

Dual Rotary Table

The A and B axes rotate the workpiece across two axes — 360° continuous, up to 300°/sec — managed by Smart Angular Movements Control. The B head is fully sealed against water and humidity.

03

Coolant tray

Catches the flow and returns it to the 6-gallon (23 L) self-filtering reservoir. The fluid is NS-Cool, a water-soluble oil concentrate.

04

Z column

Ball screws and servomotors drive every axis — high speed, high force, no measurable backlash.

05

Bellows covers

Flexible covers seal the linear rails behind them against wax chips and coolant.

06

NS-Motion control

The 5-axis control program runs on a mini PC built into the machine — monitor, keyboard, and JewelryCAM included. Nothing extra to buy or connect.

Mira 6S

Spindle

An NSK Nakanishi NR-2351 ceramic-bearing spindle, housed in precision-ground, hardened stainless steel.

The spindle nose and collet holding a tapered Mira-Bit

50,000 RPM. Runout of a micron or less.

The spindle operates at speeds up to 50,000 RPM with the required air pressure — up to 30,000 RPM without — and maintains a milling bit runout of 1 micron (0.001 mm) or less.

The standard collet is 1/8″ (3.175 mm); additional collets cover 1.00 to 6.35 mm.

Model
NR-2351
Max speed
50,000 RPM
Runout
≤ 1 μm
Power
200 W
Mira 6S / Geometry

What five axes are for.

Undercuts, full-round detail, open lattices — geometry that requires presenting the workpiece to the cutter from any angle, milled in one setup without repositioning.

Wax master of a turbine wheel, the curved blades undercut from beneath
undercuts — milled from beneath
Wax master of an open lattice cuff with thin filigree walls
open lattice — thin walls in wax
Wax master of a winged dragon figure, milled in the round
full-round detail — 360° on A and B
Mira 6S / Tooling

The Mira-Bit

The included solid carbide Mira-Bit cuts modeling wax to a depth of 25 mm in a single pass.

The Mira-Bit: a tapered solid carbide cutter standing in its case

One pass. No roughing.

The cutter geometry takes the full 25 mm depth in a single pass — no roughing cycle before the finish cut.

Average operational lifespan: up to one year.

Material
Solid carbide
Cut depth
25 mm, one pass
Lifespan
Up to 1 year
Runout
≤ 1 μm

The taper, up close

solid carbideØ 1/8″25 mm of flute

The tapered flutes carry the cut from the fine tip up the full working depth of the tool.

In the cut

B platter — tilted by A

Wax, full depth, under coolant — the workpiece tilted into the cut by the dual rotary table.

Mira 6S

Liquid Cooling

A liquid-cooled, self-filtering coolant system using a water-soluble oil concentrate — NS-Cool.

NS-Cool washing over the workpiece on the sealed B-axis rotary head

Sealed and self-filtering.

Coolant circulates continuously from a 6-gallon (23 L) reservoir and filters itself as it returns — the same fluid, cleaned and recirculated.

The B-axis rotary head is fully sealed against water and humidity penetration, so the rotary mechanism runs directly in the wet work area.

Fluid
NS-Cool concentrate
Capacity
6 gal (23 L)
Filtration
Self-filtering
Circulation
Continuous
Mira 6S

Software

From 3D file to finished model — two programs, both included, both running on the built-in mini PC.

Import your model

Bring CAD, STL, or STEP straight into JewelryCAM.

model.step

Generate toolpaths

5-axis CAM from ModuleWorks builds the cut.

toolpath

Verify the setup

Simulate stock, fixtures, and collisions first.

simulate

Cut and inspect

Run the job, then measure the part against spec.

inspect
Specifications / Mira 6S

Full technical
specifications

Machine Overview

Model
618 Mira 6S (9th Gen)
Type
5-Axis Desktop Simultaneous CNC Mill
Linear Axes
X, Y, Z
Rotary Axes
A, B

Accuracy

Resolution
0.00001″ (0.0003 mm)
Positional Accuracy
0.0003″ (0.008 mm)
Repeatability
0.0004″ (0.010 mm)
Spindle Runout
< 0.001 mm
Rotary A/B Resolution
0.10 Arc-Sec

Motion

Linear Drive
Ball Screws · LM Guide
Max Feed Rate
200 in/min (5,000 mm/min)
Rotary Speed
300°/sec (A & B)
A Turntable
6″ (150 mm)
B Turntable
4″ (100 mm)
Backlash
Zero

Spindle

Brand
NSK Nakanishi, Japan
Model
NR-2351
Speed (with air)
50,000 RPM
Speed (without air)
30,000 RPM
Power
200W
Runout
< 0.001 mm
Standard Collet
1/8″ (3.175 mm)
Collet Range
1.00–6.35 mm

Working Envelope

X
4.75″ (123 mm)
Y
7.50″ (190 mm)
Z
6.50″ (163 mm)
A & B
360° continuous

Coolant

Fluid
NS-Cool concentrate
Filtration
Self-filtered
Circulation
Continuous
Capacity
6 gal (23 L)

Power

Supply
110 or 220 VAC, 50/60 Hz
Draw
7.0 A @ 110V
Consumption
~1,000W

Machine

Width
22″ (560 mm)
Depth
32″ (810 mm)
Height
39″ (1,000 mm)
Weight
200 lb (90 kg)
FAQ

Common questions.

What does it actually produce?

Wax models and rapid prototypes for jewelry — ring bands, settings, sculptural pieces — milled from modeling wax with surfaces fine enough to invest and cast without hand-finishing the wax first.

What file formats does it accept?

Common 3D formats, including Rhino3D, Matrix, and RhinoGold. JewelryCAM runs as a Rhino 3D plugin, so work from any Rhino-based suite moves straight to the machine.

Do I need a CNC-machining background to run it?

No. JewelryCAM (JCAM), included with every machine, builds the milling toolpaths in software — no G-code and no machining background needed. You set up the job — orient the model, choose the strategy, set the stock and fixturing — and it builds the cut. NS-Motion, the control program, runs on the built-in mini PC.

How big a model can it mill?

The working envelope is 4.75″ (123 mm) in X, 7.50″ (190 mm) in Y, and 6.50″ (163 mm) in Z, with both rotary axes turning 360° continuously. The A turntable is 6″ (150 mm); the B turntable is 4″ (100 mm).

Does it need compressed air?

Only for top spindle speed. With an air supply the spindle reaches 50,000 RPM; without one it runs up to 30,000 RPM.

How does the coolant system work?

A liquid-cooled, self-filtering system circulates NS-Cool — a water-soluble oil concentrate — continuously from a 6-gallon (23 L) reservoir. The B-axis rotary head is fully sealed against water and humidity penetration.

What comes in the box?

The machine, assembled and calibrated; JewelryCAM 5-axis; the built-in computer with control software; milling bits; workpiece holders; milling wax; a monitor with arm; mouse and keyboard; cables; the coolant reservoir, pump, and hoses; a tools and start-up kit; and a user's guide with tutorial videos.

What power does it need?

Standard wall power — 110 or 220 VAC single phase, drawing about 1,000 W. At 22 × 32 × 39″ and 200 lb (90 kg), a sturdy bench is the only foundation it needs.

Next Steps

One more look, a quote, or a purchase.